I have a 512GB memory system that has a 480GB (or so) L2ARC, and a raidz2 storage pool. No dedup or compression is enabled. Although, I will enable compression in the future.
By default vfs.zfs.arc_max is about 300GB and the L2ARC is hardly touched. I've seen a couple hints recently on the mailing lists that having too big of an ARC can be a performance hit because it takes a long time to inspect it when something needs to integrate over the entries. I've also had issues with running 9.1 on this machine due to zfs deadlocks or stalls and am currently "stuck" using 9.0 with no issue. So, I was wondering if shrinking the ARC would potentially help and what should I shrink it to? I am thinking about setting vfs.zfs.arc_max to 64GB. Does anyone have an opinion? -- Reed A. Cartwright, PhD Assistant Professor of Genomics, Evolution, and Bioinformatics School of Life Sciences Center for Evolutionary Medicine and Informatics The Biodesign Institute Arizona State University _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"